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HOMESERVICE MANUALSMAZDA20086 S SPORT, 4D HATCHBACK, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 600 (SYMPTOM TROUBLESHOOTING [ENGINE CONTROL SYSTEM L3 WITH TC))NO. 12 LACK/LOSS OF POWER-ACCELERATION/CRUISENOTES
2008 Mazda 6 s Sport, 4D Hatchback, Standard

No. 12 Lack/Loss Of Power-Acceleration/Cruise: Notes

2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Notes
WARNING: This page is about a different car, the 2007 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
POSSIBLE CAUSES DESCRIPTIONS

12 LACK/LOSS OF POWER - ACCELERATION/CRUISE
DESCRIPTION  Performance is poor under load (e.g., powers down when climbing hills).
POSSIBLE CAUSE 
  • Improper A/C system operation
  • Improper operation of A/C cut-off control
  • Air leakage or restriction from intake-air system
  • Loose turbocharger compressor-to-intake manifold duct connecting
  • Turbocharger rotating assembly binding or dragging
  • Wastegate valve malfunction (stuck open)
  • Turbocharger malfunction
  • Charge air cooler malfunction
  • Variable swirl system malfunction
  • Improper operation of electronic throttle control system
  • Purge solenoid valve malfunction
  • EGR system malfunction
  • Brake dragging
  • Low engine compression
  • Poor fuel quality
  • Vacuum leakage
  • Incorrect signal to ignition coil
  • Spark plug malfunction
  • Engine overheating
  • Throttle body malfunction
  • Air cleaner restriction or dirty
  • PCV valve malfunction
  • Improper valve timing due to jumping out of timing chain
  • Improper operation of variable valve timing control system
  • Restriction in exhaust system or three-way catalytic converter (TWC)
  • Leakage at exhaust manifold or turbocharger mounting flange
  • Intermittent open or short fuel pump related circuit
  • Inadequate fuel pressure (high-or low pressure side)
  • Fuel pressure sensor or related circuit malfunction
  • Suction control valve or related circuit malfunction (built-in high pressure fuel pump)
  • Relief valve malfunction (built-in delivery pipe)
  • High pressure fuel pump malfunction
  • Improper fuel pump speed control operation
  • Fuel pump mechanical malfunction
  • Fuel line restriction or clogging
  • Fuel injector malfunction
  • Incorrect fuel injection timing
  • Erratic signal from CKP sensor
  • Erratic or no signal from CMP sensor
  • ECT sensor or related circuit malfunction
  • Manifold absolute pressure (MAP) sensor or related circuit malfunction
  • Accelerator position sensor or related circuit malfunction
  • MAF/IAT sensor or related circuit malfunction
  • IAT sensor No.2 or related circuit malfunction
  • Intermittent open or short circuit MAF sensor, accelerator position sensor, TP sensor and VSS
  • Clutch slippage
  • Injector driver module or related circuit malfunction
    WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services:
    • Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel.
    • Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injury or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual.

      (See AFTER REPAIR PROCEDURE ).

      (See BEFORE REPAIR PROCEDURE ).

    RENDER: 1.0x

    NO RELATED

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    When to See a Mechanic

    Stop DIY work and contact a certified mechanic immediately if any of the following apply:

    • • You smell fuel, burning insulation, or see smoke.
    • • Brakes feel soft, pull hard to one side, or make grinding noises.
    • • The engine overheats, stalls repeatedly, or misfires under load.
    • • You are missing required tools, torque specs, or safe lifting equipment.
    • • You are not confident in the next step or safety outcome.